Susceptibility of commensally available Escherichia coli isolates of neonatal calves on commonly used on-farm antimicrobials

The present study was carried out to find out the resistance of commonly used on-farm antimicrobials on commensally available E.coli isolates from faeces of young calves by the most simplified antibiogram study. Highest number of E coli isolates were sensitive to cefriaxone/ tazobactum (36.17%) followed by the resistant sulphadiazine (16.31%) and ofloxacin (13.47%), respectively. Around 11.23% isolates were also found to be resistant to cefotaxime. Therefore, even the most common antibiotics used to tackle common infections in calves are slowly becoming resistant. Such problems of disease occurrence and routine antibiotic use should be addressed by suitable managemental practices followed by appropriate vaccination schedules hence, reducing the dependence of farm animals on antibiotics.